What is a change in the base sequence of DNA called

What type of bond holds the nitrogen bases to another across the middle of the helix

What is the primary function of DNA

What are two functions of DNA polymerase during replication

Why is it so important that the DNA molecule be able to make copies of itself

The process of forming an exact copy of the DNA molecule

The main enzyme of replication whose function is to link together individual nucleotides along a template strand is called what

What is meant by the base-pairing rules

In what part of the cell does replication occur

Each strand of the DNA molecule can be used to make another strand during replication. This is because the two sides are ______ to each other

When a DNA molecule is replicated, what is the relationship between the original strand and the newly formed strands of DNA

Replication results in two copies of the DNA strand

What is the advantage to the multiple sites of replication along the DNA molecule

At the end of replication, each DNA molecule has one original strand and one new strand

The process of DNA replication produces an identical copy of the original DNA strand

Which of the following might cause accidental damage or changes in existing DNA

During replication, the two nucleotide chains ______ and each chain will serve as a ______ for the production of a new DNA chain. The sites where new nucleotides are added are called _____

DNA replication occurs simultaneously at many sites along the molecule, speeding up the process of replication

The primary purpose of replication is to produce new DNA strands that are very different from the old strands

Mutations always cause serious and harmful effects in the organisms in which they occur

When replication is complete, two _____ copies of the DNA molecule have been produced and the cell is ready to begin ______.

Damage of DNA can never be repaired

Enzymes called _____ cut out damaged sections of DNA. The enzyme _____ fills the resulting gaps with new nucleotides. _______ then seal the free ends, making the strand complete.

Mutations can sometimes be an advantage by making the organism slightly better suited for its environment

The copying of the DNA molecule is a fairly reliable process. As new nucleotides are added, there is an error rate of about 1 in _____ base pairs. The enzyme _____ proofreads the new strand and looks for errors. If a mistake is found, this same enzyme removes the erroneous _____ and replaces it with another. After the proofreading, there is a final error rate of only 1 in ____ base pairs.

When replication occurs, it takes place at multiple sites along the molecule called

The replication of DNA begins at one end of the molecule and proceeds to the other end